McDonald's

I've been through the drive-thru at this Mcdonalds a few times and never had any issues. I stopped by one day with my 19 month old son and decided to "dine in". Well...this turned out being a disgusting experience. Nearly every table was filthy...there were only two tables that were clean. I sat down at a booth and there were dead flies on the bench...it was so gross. I'll never go back to this location...if it was that dirty in plain sight, what does it look like in back where they prepare the food? I would stay away from these "Golden Arches".